Knot-tying implement



Jan. 5, 192a. 1,568,311

R. W. BARKER KNOT TYING IMPLEMENT Original Filed Feb. '7. 1918 4 Sheets-Sheet 1 11 12 G 11 W/T/VESS: nvmvro/a' IA .151 I 7) 1 1 .51.17. Rbefl \MBarker B I 141601,. 1 1 A 170mm.

Jan. 5 1926, 1,568,311

R. w. BARKER KNQT TYING IMPLEMENT Original Filed Feb. '2. 1918 4 Sheets-Sheet 2 III l Illl Z?) i L i y 4 20 i 21 Y Y 4 I 7 -1 A I I say c WITNESS:

INVENTOR,

Rob erT Wfiarker,

Jan. 5 1926. A 1,568,311

R. W. BARKER KNOT TYING IMPLEMENT ori inal File d Feb. 7. 1918 4 Sheets-Sheet INVEJNTOR, Robefi' WLB arker,

ATTORNEY- Jan. 5 1926. 1,568,311

R. w. BARKER KNOT TYING IMPLEMENT Original Filed Feb. '7. 1918 4 Sheets-Sheet 4 WITNESS: INVENTOR\ W M Kobefi \MBoa'keT n Q v A TTORNEY Patented I Jan. 5, 1926.

UNITED STATES 1,568,311 PATENT OFFICE.

ROBERT W. BARKER, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO EDWARD A. TAFT, TRUSTEE, OF BROOKLINE, MASSACHUSETTS.

KNOT-TYIN G IMPLEMENT.

Application filed February 7, 1918, Serial No. 215,789. Renewed September 3, 1920. Serial No. 408,053.

To all whom it'may concern:

Be it known that I, ROBERT W. BARKER, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Knot-Tying Implements, of which the following is a specification.

The principal object of this invention is to provide an implement for joining two threads or strandsjby tying therein a knot known as a weavers knot, or substantially such a knot. The weavers knot, as shown Figure 25- of the accompanying drawings, is a knot characterizedby two loops (one in each strand) of which one passes through the other loop and has the strand of the latter loop passed through it and the free end of such strand interposed between it and said strand. Such a knot is preferred by weavers and others having oc-' casion to draw the connected strands through restricted openings, as the spaces between the dents of a loom reed, because it is best adapted to pass through such openings without .catching and with the least danger of. breaking or injuring the strands.

In the accompanying drawings, Figure 1 is a front elevation of the implement'shown held by the hand of the operator, ready for tying a knot;

Figures 2 to G are views of the implement on a larger scale and showing all the parts in the position preparatory to tying a knot, Figure 2 being a front elevation; Figure 3 a right side elevation; Figure 4 a rear elevation, Figure 5 a. left side elevation and Figure 6 a plan; I

Figure 7 is a front elevation of the implement with the main rocking shaft 03 and the following parts carried thereby, to wit,

' the main operating handle m, segment n,

and front or swinging crotch member h, removed;

Figures 8 and 9 are rear and side elevations of said member h with a certain lever 2 removed therefrom;

Figure 10 is aside elevation of the com- "binedstrand separator and strand clip;

Figures 11, 12 and 13 are side elevations of the aforesaid lever and segment and a certain transmission pinion;

Figure 14 is a side elevation, partly in section, of the tubular mounting 8 and pinion 9 for the knotting bill;

Figures 15 and 16 are inside elevations of the two sections of the knotting bill, these views also showing end elevations of said sections and Figure 15 showing the moving jaw of the knotting bill; I

Figure 16 is a sectional view of the working end of the knotting bill;

Figure 17 shows in longitudinal section and end elevation the cam for controlling said jaw; I

Figure 18 shows the stationary knife in front and side elevation;

Figures 19 and 20 are fragmentary views on a larger scale respectively showing the implement in side elevation, partly in section on line 19-19 of Figure 2, and in horizontal section on substantially line 2020 of the same figure;

Figures 21-24 show the knot-tying operation by successive steps; and

Figure 25 shows the finished knot.

Referring, first, to Figures 1925: A cross is made in the strands, by means to u be explained, of such character that each strand crosses and re-crosses the other; the specific arrangement, shown best by the plan views of the cross (Figures 20 and 21), involves strand A extending from the right of strand B (as the implement is held in operative position in the users hand, Figure 1), over and under strand B back to the right.

As will be explained, the knotting bill, rotative on aihorizontal axis, has its free end turned off and tapered, being also split to form counterpart turned-off tapered halves between which is fulcrumed a jaw which ultimately coacts with the bill to sever one of the strands (B) and hold it for drawing tight the knot. The bill rotates in the direction of the arrow in Figure 19, its starting position being, as there shown, where the bill projects rearwardly and downwardly, underlying the rear V of the cross. Figure 22 shows the knotting bill after it has performed somewhat more than three-fourths of a' revolution, its tapered end or point having first entered the rear V of the cross, then the forward V, and so formed the loop A (see also Figure 25). The jaw 13 of the bill, at first wholly sheathed between the halves of the bill as it appears in Figure 24, is in this position more or less open, standing between loop A and the free end of the bill. When the bill has completed somewhat more than a full revolution, a lever arm 28 has moved the strand A to the right of the free end of and across the bill (Figure 23) so that said strand, on further rotation of the bill, will not lie between the jaw 13 and the bill and be out and held thereby. Strand B, however, remains vertically overlying the space between the open jawand bill, so that when the bill has completed about a one and one-quarter revolution and the jaw is then closed it will be cut and held by the coaction of said jaw and the bill, now ensuing. The thus-cut end of strand B must now be passed. first under the two parts of strand A extending from its loop A and then between the loop and strand B, as in Figure 25, to'form loop B. This is accomplished by slipping the noose or cincture which has been formed on the knotting bill off the same onto strand B (still held at its severed end by the knotting bill) thus: lVhile the bill is turning another quarter-revolution to its limit (pointing forward). certain means begins to operate to draw forward on the two strands (strand A having been meanwhile severed at a point behind the bill), which results in said cincture being slipped off onto the end portion of strand B held by the bill and finally drawn tight, developing the desired knot. The foregoing outline of the knot-tying will facilitate an understanding of the mechanisms involved, now to be described:

There is a blade-shaped frame a having rearwardly projecting bearing ears I) and its upper portion set back, by a bend a, out of the plane of its lower portion, and also having at the left upper side a forward vertical wall 0. The main shaft (1 is journaled in ears I) and on this shaft is pivoted an eye-piece 6 through which and an eye f on the lower end of the frame a strap g maybe passed for buckling the implement on the left hand of the user, as shown by Figure 1.

h is a blade-like memberhaving its upper end bent rearward, its lower end having rearward ears 2' which project through slots 7' j in the frame a (Figure 2) and are penetrated by shaft (Z, on which member h is thus fulcrumed. On its left side is a' rearward arm is having a lateral pinl (Figures 8 and 9). The main shaft has fixed to its right and left ends, respectively, the

operating arm or handle m and a segment a,- the segment having an arc-shaped slot 0 reposition) is determined by contact of member h with member a and the forward end of slot 0 with pin Z; the downward limit ing a rearwardly extending forked clip 3 and its top forming a horizontal table 2, and having rising from said table a vertical forwardly canted separator blade u with a depending laterally offset spring detent v, is secured to the back of the frame a by a screw in in such manner that the separator bisects the crotch p and the table reaches to the right. Member h likewise has a crotch w (Figures 2 and 8) having convex sides, the narrowest part of the crotch being offset somewhat to the right of said member, so that the narrowest parts of the crotches p and a" are unopposed or offset with respect to each other; the crotch communicates downwardly with an opening y which reaches to the left (Figure 2). A lever 2 (Figures 2, 3 and 11) is fulcrumed at 2 on the member h and its upper end portion reaches from a point near the left hand end of the opening y upward and to the right, its edge 2' forming a convex curve and crossing the opening and the crotch; this lever has but slight movement limited by engagement of its lugs 3 and 4 with the right side of member k and the left side of right hand slot 7', respectively. To form the cross the two strands (member h being in fully closed position) are held by the fingers of the operators left hand (dotted lines, Figure 1) ressing against the flat front face of the rame a,

his right hand being used to separate the strands by means of the separator .u (see the upwardly extending dotted lines in Figure 1, showing the strands in the act of being separated) and then carry their free ends down back of the implement into the grip of the clip .9. It may be here remarked that between a presser foot 5 of lever the crotch m. The operation of entering the strands into the crotches involves, as to the member 71-, the strand (A) at the left of the separator being stopped against further descent by the detent u where the detent impinges against the left side of the crotch a, and the strand B passing down into the z and an anvil 6 on the frame (which coact to grip the strands edge lutiona Because the cam abuts the opening 11 into which it is deflected by the v of lever .2, the two strands lying together in'the ,notch between and 6; as to the ,member a, the entering operation involves strand A, which enters crotch p at the left of the separator, shifting to the right-in opening q under the table-forming portion 2 (because strand receiving clip .9 is somewhat offset to the right of the implement, Figure 6) and strand B, which is at the right side of the separator, coming to rest on the table t. On a view to Figures 20 and21, andparticularly Figure 20, it will be seen that in the final position of the strands strand B has undergone relatively little deflection as tothe cross formed, but strand A reaches to the left, from the point where its downward descent was stopped by the detent, and over and around strand B and-then back to the-right. cross is thus formed of the kind already described, the rearward and forward -Vs of which are indicatedin Figure 20 by X and X, respectively.

' Screwed into the wall cis a long bearing 7 in which is journaled a sleeve 8 formed at its inner end with a pinion 9. The twosections 10 and 11 ofthe knotting bill are secured in this sleeve by a pin passed.

through the holes 12 in these three parts.

The free ends of the sections are tapered and turned off, and the edge 10 of the section 10 is dull and the edge 11 of section '11 beveled to ashear edge or knife. Fulcrumed'in the slit between and conforming in side elevational shape to the end, portions of the sections 1011 is a. jaw 13 having a T-shaped head 14 at its inner end. The jaw has its convex edge at one side (next bill section 11) "beveled to a shear edge and at the other side rounded or dull. It will be seen by Figure 16 that if a strand is interposed between the ends of the bill sections and the open jaw and the jaw then closed the strand will be sheared off by 11 and 13 and pinched between and thereby gripped by 10 and 13. The point or free end of the bill rotates in a vertical plane bisecting the Vs, X, X, of the cross. I

Revoluble on the bill between pinion 9 and the head 14 of the jaw is a cam 15 whose cam surface bears against said head; the same having an arm 16 permitting, by its contact with the stops 17 and 18 (Figure 7 the cam to perform only a part of .a revo- 1n1on onthe one hand and head 14 ofthe aw 13 on -the other the cam will turn with the bill until its rotation ischecked byone. ofthese stops, whereupon it will obviously cause the jaw to oscillate. On aastud 19 backof-bearing 7 is journaled a transmission pinion 20 which meshes with pinion 9 and;has on its hub a flat 21' (Figure-13).

The segment 12 has a segmental series of thereupon opposes .such outer face to the fiat 21 on pinion 20, sliding over the same. As best shown in- Figure 2, the periphery of the segment overlaps pinion 9 to prevent inward displacement of said pinion and its sleeve 8 out of bearing 7 A U-shaped plate 24; (Figure 18) having an upstanding shearing edge or knife 25 is secured to the frame a so that its shearing .edge is just to the right of opening 9 (Figure 7); fulcrumed in the plate is a bellcrank lever one arm 26 of whichengages in a cam "slot 27 in the segment n and the otherarin -28 of which oscillates in shearing relation to the edge 25 and is preferably beveled (Figures 21 to 24) to cooperate therewith in shearing.

\Vhen the lower end 4 of the hereinbefore mentioned leverz is at either end of slot j said lever is free, said ends of the slot having recesses 29 to afford the necessary clearance; but when member h is'between its limits of swinging movement, and consequently said end 4 of lever h is between the ends of the slot, the left side of the slot forces the lower end of the-lever to the right, so that at 5 it will press the strands against the anvil 6 and so grip them. The

left side of slot therefore constitutes a cam for actuating the lever.

Operation: In turning the handle to the dotted line position, Figure 3, the segment a, as the rear of slots 0 engages stud 7, picks up and moves the crotched member 71 to dottedline position of Figure 3. This is the working stroke of the parts. In the return stroke the handle and segmentmove back idly till the forward'end of slot 0 abuts stud Z, when, the crotched member h is carried back to the closed onstarting position. The manner of forming the cross has been already explained. As soon as the crotched member it begins to move forward with the segment a in the working stroke lever 2 is moved by the cam side of slot j to grip the forward end of the two strands between 5.-and 6, thus to J drawthem forward; at the back of the implement they are held by the clip 8. This drawing on the playing between the spaced stops 1718)-,

' ment of the jaw.

and thereupon the drawing of the cincture tight into a knot afterstrand A has been severed by 2825 and while strand B, previously severed, is still gripped by the knotting bill, and finally the clearing of the united strands from the bill by Withdrawing strand B from the grip thereof. After such clearance, and as soon as the cam side of slot j ceases to act on lever 2 (forward position of member 72,) the united strands may be'readily removed from the crotch in member k.

The gearing connecting the bill and segment n causes'the former to start rotating immediately upon depressing the handle; the rotation continues (the bill turning in all somewhat more than 1 revolutions) well after the member he begins to advance, stopping as soon as gear teeth 22 leave the pinion 20, whereupon the latter and bill are held fixed by shoe 23 engaging fiat 21 of said pinion. Cam 15 (on account of its arm can rotate but a relatively short distance withthe bill, which, due to the frictional engagement ofits jaw head 14 and pinion 9 with the cam, carries the cam around until it is arrested by stop 17 the cam thus stopping, the continued rotation of the bill obviously effects opening and closing moveting of the parts after tying a knot cam arm 16 was left impinging against stop 18, hav-' ing closed the 'jaw.) The opening of'the jaw begins after the bill point has well'entered first the V marked 1 and then the V marked X, and the jaw is more or less fully open, holding loop A which has been formed, on the bill, at about the'position of the bill in Figure 22-. In Figure 23 the bill has advanced another quarter revolution, and the jaw still holds the loop A on the bill. As the bill continues rotating from this position the jaw is closing, and about when the bill projects upward the jaw coactswith the sections of the bill first to sever and then to grip the strand B. While the bill is'now turning forward member It draws forward on the strands (strand A having been severed, as will be explained) so that the cincture formed begins to be stripped from the bill. The bill now stops rotatingdue to shoe 23 engaging fiat 21 of pinion 20-and the still moving member 7L draws the cincture clear of the bill and, as the latter still grips the severed end of strand B, pulls the cincture tight to form the knot and finally withdraws said strand end clear of the grip of the bill."

The movement of lever 26-28 in responseto cam-slot 27 beginsas soon as segment a starts to move, and its arm 28 is clear and to the right of the point of the bill, holding strand A across the bill and its jaw, in the position of the parts shown by Figure 23.

(In the previous reset- Said lever remains then practically without motion until after strand B has been severed and just before the cincture is to be stripped from the bill, whereupon cam slot 27 again moves it to the right so that arm28 and knife 25 coaet to sever strand A. Strand A is allowed to relax sufliciently so as not to tauten 'and offer resistance to the displacing influence of lever arm 28, because immediately member A cleared detent a; the stop offered by the latter to the descent of said strand of course failed and the strand fell into opening y, slack.

It will be seen on reference to Figures 21 to 23 that in tying such a knot, in particular, as has been hereinbefore specified (a weavers knot) though the mechanism shown actually develops the loop A, the tying or knotting bill in effect passes a part of one strand (as 13) near the cross around both parts ofothe other strand (as A) near the cross and. between the first strand and said parts of the other strand-compare figure. 25, inthe actual adaptation illustrated and described having already severed said first strand i i As to the strand-cross forming part of my invention, this involves strand checks (as table If on the one hand and that afforded where detent 'v abuts one side of crotch arranged one forward of the other and against which the strands are respectively adapted to bear, means to guide the strands to the checks, and clearanceafforded one strand (asopening if or g) for displacement laterally under the check for the other strand: in. the actual form set forth, where one strand 18 made to cross and recross the" strands against said checks and affording clearance to one strand to be displaced lat erally under the check for the other strand.

2. A strand-cross-forming instrumentality having strand checks arranged one forward of the other and against which the respective strands are adapted to bear, said instrumentality having means to guide the strands against said checks and affording clearance to one strand to be displaced laterally under the check for the other strand and also having means to cause such lateral displacement of said strand.

3. A strand-cross-forming instrumentality having strand checks arranged one forward of the other and against which the respective strands are adapted to bear, said instrumentality having means to guide the lit) strands against said checks and affording clearance to each strand to "be displaced laterally under the check for the other strand. 4. A 'strand-cross-forming instrumentality having strand checks arranged one forward of the other and against which the respective strands are adapted to bear,; said in-.

'ing the strands by the separator and ehtering them into said device, to permit one strand to be displaced into crossing relation to the other.

6. A. strand-cross-forming instrumentality including a separator for the strandsan'd a crotched device having means, on separating 'thestrands by the separator and enter-.

ingthem into said device, to .permit each strand to be displaced'into crossing relation to the other. a

7.- A strand-cross-forming instrumentality including a separator'for the strands and a crotched device having means, on separating the strands by the separator and entering them into said device, to deflect one strand into crossing relation to the other.

8. A strand-cross-forming crotched device having means on entering the strands thereinto to deflect the strands each under the other at different points, whereby to produce a crossing-over and crossing-under of one strand relatively to the other.

9. The combination, with the frame, of a rotary tying bill having afmovable jaw coactive therewith to grip a strand, means to rotate the bill, and a cam for controlling said jaw friction-moved by and with the rotating bill-and having its movement with the bill limited by the frame.

10. The combination, with the frame, of a rotary tying bill having a movable jaw coactive therewith to grip a strand, means to rotate the bill, and a cam for controlling saidjaw friction-rotated by and with the rotating bill and having its movement with the bill limited by the frame.

11. The combination, with the frame, of a rotary tying bill having a movablejaw coacting therewith to sever a strand, means to rotate the bill, and a cam for controlling said jaw friction-moved by and with the rotating bill and having its movement with the bill limited by theframe' 12. The combination, with the frame, of a rotary tying bill having a movable jaw coactive therewith to sever a strand, means to rotate the bill, and a cam for controlling said jaw, friction-rotated by and with the' rotating bill and having its movement with the bill limited by the frame.

13. Inv combination, two strand-gripping structures-each having means to grip both strands, and strand-tying means operative on the strands between the strand-gripping portions of said structures.

14. In combination, two strand-gripping structures each having means to grip both strands and also having means guiding yarns entered therein to form a crossin the strands as a consequence of entering the yarns into the device, and strand-tying means operative on the strands at, the cross.

15. In combination, two strand-gripping structures, each having means to grip-both strands and one movable in the other, and strand-tying means carried by one. of said structures and operative on the strands be:

tween the strand-gripping portions of said structures.

16. In combination, two strand-gripping structures each having means to grip both strands and also having means to form a cross in the strands and one movable in the other, and strand-tying means carried, by one of sa d structures and operative on the strands at the cross. 1

17. In I, combination, a supporting structure, another structure movable in the first structure, one of said structures having means to grip the material to be tied, tying; means movable 1n the other structure, and

means to transmit movement from the mov-- able structure, on movement thereof, to the tying means. I

- 18. In combination, two sti'andgripping structures, one movable in the other, strandtying means carried by one of said structures and operative on the strands between the strand-gripping.portions of said structures, and means, aetuatedby the movable structure on movement thereof, to actuate the tying means. I l

19. In combination, two forming structures, each having means to grip both strands and one movable in and relativelyaway from the other, and strandtying means carried by one of said structures.

20. In combination, two strand-crossforming structures each having means to grip both strands and one movable in and relatively away from the other, and strandtying means, carried by one of said structures and operative on said strands at the cross.

21. In combination, two strand-crossforming structures, one movable in and relatively away from the other and having means to hold and pull on both strands during its movement, and strand-tying means strand-crossmeans carried by the other of said structures, and means to synchronize the movements of the movable structure and said tying means.

23. In combination, a supporting structure, a strand-pulling structure movable in the supporting structure and having means to clamp both strands and a tying bill rotative in said supporting structure on an axis extending transversely of the path of movement of said movable structure and having its free end turned off. 24. In combination, a supporting structure, a strand-pulling structure movable in the supporting structure and having means to hold and pull on both strands, said structures having means to form a strand-cross between them, and a tying biH rotative in said supporting structure on an axis extending transversely of the path of movement of said movable structure and having its tree end turned off and arranged to rotate in an orbit bisecting the cross.

25. In combination, a crotched structure, another crotched structure movable in the first structureqto and from. the same, the crotches of said structure being substantially opposed when the movable structure approaches the first-named structure and said crotches being then adapted to receive the strands to be joined, and tying means arranged on one structure, the other structure having means to hold and pull on the strands.

26. In combination, a crotched structure, another crotched structure movable in the first structure to and from the same, the crotches of said structure being substantially opposed when the movable structure approaches the first-named structure and said crotches being then adapted to receive the strands to be joined, tying means arranged on said first-named, structure, and

'means to actuate the tying means from the movable structure on movement of the latter.

27. A knotter having therein strand-cr0ssforming instrumentalities, comprising, in combination, tying means acting in relation to crossed strands to form a cincture- 'together, said means comprising strandguides adapted when relatively stationary to" position strands entered thereat in crossing relation upon mere tension applied to the strands, in combination with tying means adapted to work on one or more of the strands in relation to the crossing so formed. 29. A knotter for weavers knots having therein strand-guides adapted on mere entrance therein and tension upon strands applied thereto by the operator the said guides being stationary in respect to the knot formmeans to arrange the strands in preliminary relation, in combination with knot-forming means constructed and arranged to operate upon the positioned strands to form the knot.

In testimony whereof I aflix my signature.

ROBERT IV. BARKER. 

